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Modified Perona-Malik Equation and Computer Simulation for Image Denoising

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The edges and textures of a digital image may be destroyed by traditional denoising methods, which is a difficult problem in image denoising. In this paper, anisotropic diffusion algorithm based on Partial differential equation is studied. First, image denoising algorithms based on Perona-Malik model are studied. Second, a modified Perona-Malik model is proposed. In the proposed model, the gradient statistic and edge thresholds are embedded into the Perona-Malik equation. Finally, the effects of this model and some other models are compared and analyzed. The experimental results show that the proposed modified Perona-Malik model outperforms the original Perona-Malik model in removing Gaussian noise, and the edges and textures of the image are well preserved.
Title: Modified Perona-Malik Equation and Computer Simulation for Image Denoising
Description:
The edges and textures of a digital image may be destroyed by traditional denoising methods, which is a difficult problem in image denoising.
In this paper, anisotropic diffusion algorithm based on Partial differential equation is studied.
First, image denoising algorithms based on Perona-Malik model are studied.
Second, a modified Perona-Malik model is proposed.
In the proposed model, the gradient statistic and edge thresholds are embedded into the Perona-Malik equation.
Finally, the effects of this model and some other models are compared and analyzed.
The experimental results show that the proposed modified Perona-Malik model outperforms the original Perona-Malik model in removing Gaussian noise, and the edges and textures of the image are well preserved.

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